Explaining, Convincing and Proving - Secondary

This webinar is part of our Secondary 'Developing mathematical thinking' collection. There is accompanying guidance, which you might find helpful to read either before or after watching this webinar recording.

During this webinar we had a go at the following tasks: 
Connect three
Factors and multiples game
Dozens
Treasure hunt
What's it worth?
Fruity totals
M, M and M
Slick summing
Tilted squares
Cyclic quadrilaterals

NB Since this webinar was recorded, we have changed the way we refer to this aspect of mathematical thinking - it is now labelled as  'Explaining, convincing and proving', but the content of the webinar is still very much applicable.